Combined mechanical lock and electric-circuit breaker for lift gates and doors.



W. H. BRENNER.

COMBINED MECHANICAL LOCK AND ELECTRIC CIRCUIT BREAKER FOR LIFT GATES AND DO0R S.

APPLICATION FILED APFIMII I9I3. RENEWED JUNE IB. |918.

Patented Jun. 2l, 1919.

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W. H. BRENNER.

COMBINED MECHANICAL LOCK AND ELECTRIC CIRCUIT BREAKER FOR LIFT GATES AND DOORS.

APPLICATION FILED APR. 4. 1913. RENEWED JUNE 18. 1918v Patented Jun. 21, 1919.

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w. H. BRENNER. COMBINED MECHANICAL LOCK AND ELECTRIC CIRCUIT BREAKER FOR LIFT GATES AND DOORS.

APPLICATION FILED APR.4. 1913. RENEWED JUNE 18. l9l8.

Patented Jan. 2l, 1919.

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w. H. BRENNER. CQMBINED MECHANICAL LOCK AND ELECTRIC CIRCUIT BREAKER FOITLIFT GATES AND DOORS. APPLICATION FILD APR- 4. I9I3. HENEWED )UNE IB. I9I8.

1,291,750. Patented Jan. 21, 1919.

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UNTTED sTaTns PATENT ernten.

WILLIAM HERRMAN BRENNER, OF' EAST FINCHLEY, LONDON, ENGLAND, ASSIGNOR OF TWO-THIRDS TO ELECTROMOTOR EQUIPMENT COMPANY, LTD., OF LONDON,

ENGLAND.

COMBINED MECHANICAL LOCK AND ELECTRIC-CIRCUIT BREAKER FOR LIFT GATES AN D DOORS.

Application led April 4, 1913, Serial No. 758,889. Renewed June 18, 1918.

To all whom it may concern.'

Be it known that I, WILLIAM HERRMAN BRENNER, a citizen of the United States ot America, residing at 23 Bedford road, East Finchley, London, N., in the county of Middlesex, England, have invented certain new and useful Improvements in and in Connection with Combined Mechanical Locks and Electric-Circuit Breakers for Lift Gates and Doors, of which the following is a specification.

This invention has reference to improvements in. and in connection with combined mechanical locks and electric circuit breakers particularly applicable for use on gates and doors protecting the openings to the lift well, in which the cage travels, also applicable to the gates or doors protecting the opening of the cage; and is characterized thereby that the gates or doors are locked during all periods of travel of the cage, and also when the cage is at rest, eX- cept the particular gate or door at the opening at which the cage is at rest; and by this invention the gates or doors are locked in a manner that they cannot be tampered with, either when the cage is traveling or when the cage is at rest.

By present practice the gates or doors to lift openings, and the like, are automatically unlocked during the particular period that the cage is traveling past any floor, when during such period anyone on a landing can open the gate or door thereby breaking the current circuit, which stops the lift, until the attendant or one of the passengers closes the said door; and the object of this inventions is to obviate such defects, and to provide an improved combined mechanical lock, and electric circuit breaker.

The invention is carried out in the manner hereinafter described and illustrated by the accompanying drawings, in which Figure 1 is a part elevation .of the combined mechanical lock and electric circuit breaker, showing the gate locked and the current circuit made; Fig. 2 shows the gate open and the current circuit thereby broken; Fig- 3 Specification of Letters Patent.

Patented Jan. 21, 1919.

Serial No. 240,686.

is a vertical section of the combined Inechanical lock and electric circuit breaker.

A modified arrangement is shown by Figs. f1, 5 and 6, whereby the circuit breaking lever and the locking rack are automatically withdrawn by the opening of the gate through a predetermined distance avoiding any ohbjectionable projecting parts particularly essential when the combined mechanical lock and electric circuit breaker is fixed in an intermediate position, and not at the top of thc gate; Fig. t is a part elevation showing the gate locked when the current circuit is made; Fig. 5 shows the gate partially opened when the current circuit is broken, and this view shows the circuit breaking lever and the locking rack withdrawn; Fig. 6 is a vertical section through the lock casing.

Figs. 7, 8, 9 and 10 show a further modiication of parts when applying the invention to a hinged door, Fig. 7 showing the door locked and the current circuit made; Fig. 8 shows the position of parts when the current circuit is broken, and the locking rack raised from the locking position; Fig. 9 is a side elevation of the combined mechanical lock and electric circuit breaker; and Fig. 10 is a part plan showingthe door locked.

Figs. 11 and 12 show front Iand plan of one modication, and Figs. 13 and 14 a front and plan of another modification showing the cam which operates the combined mechanical lock and electric circuit breaker controlled by an electric magnet and weight or spring.

The same numbers in the diii'erent views indicate the same or similar parts.

With reference to the accompanying drawings, and describing the invention as applied to a gate of the collapsible type, which consists of vertical bars commonly called pickets connected together by means of hinged diagonal bracings, and arranged so that when the gate is closed the said pickets, being connected some few inches apart, protect the openings; but when the =f sive.

gate is collapsed, the said pickets fold and occupy but little space at one side of the opening, thereby giving a clear way. The invention can be carried out in the following manner I A circuit breaking lever 1, and locking rack 2 are pivoted at 3 and 4 to a lock casing 5 secured to the first picket 6 of the gate by the screws or rivets 7 8; the parts 1 and 2 are pivoted to allow them a certain vertical radial movement to accommodate the rise and fall of the latch 9, upon which latter is formed a projection 10 for engaging the locking rack 2 as shown in Figs. 1 to 6 inclu- The latch 9 is pivoted to the circuit breaker casing 11 at 13., being fiXed upon the pin 12 and upon the pin 12 is also secured a lever 14 carrying a roller 15 which at times engages the cam 16 in a manner to be here inafter described. vWhen the gate is closed V.the end 17 ofthe circuit breaker lever 1 `be- -comes interposed between the top of vthe latch 9 and the underside :of the slide 18 which latter makes contact with the plun-- gers 194-2O carried inthe brackets 21.-22 fixed to the insulated 'base 23 the contact being made against the resistance of the springs 24-25 mounted on the said plungers 19-20, whereby the latch 9 is depressed upon the cam 16 ceasing to make contact with the roller 15, thus bringing the proj ection 10 into .locking connection with the aforementioned `rack 2; the wiring leads to the brackets 21-22 and passes .through the ferrules 26-27 to the screw connectors 28-29, and the front of the casing 11 can be fitted with a glazed cover 30 to facilitate the Y inspection.V The lock casing'slides in the strap 31 secured to the second picket 32 by the screws or rivets 33-34g when the current circuit is broken as shown inV Figs. 2 and 6 the slide 18 Yrests upon the stop 35. Y

Referring to Figs. 4, 5, 6, a cam lever 36 is shown to withdraw the circuit breaker lever V1 and locking rack 2 from projecting beyond the first picket v6 after the gate .has been opened a predetermined distance; the cam lever 36 is mount-ed loosely upon the pivot 37 carriedby the second Ypicket 32'of the vgate, the slot 38 being provided to-allow the first picket 6 to be moved against the second picket 32V when the gate is yfully opened; a projecting part y39 at the end yof the cam lever 36 engages aslct 40 formed in the sliding part 41 which :in this application of the invention carries the circuit breaker vlever 1 and the locking rack 2 to withdraw parts 1 and 2 on opening the gate and to project the spartsl and 2 uponV closing the gate for making the current circuit and locking the vgate; the Vcam lever 36 is operated bythe pin 42 projecting from the side of the lock casing and engaging they surface 43 for vprojecting Fig. 7.

the parts 1 and 2 and the pin 42 engages the surface 44 for withdrawing the parts 1 and 2; the distance between the first picket 6 and the second picket 32 is greatest when the gate is fully closed and the space becomes reduced to m'l when the gate is fully opened,

the projection or withdrawal ofthe parts 1 and 2 is effected by making use of the varying distance between the first picket 6 vand the second picket 32 whenthe gate is ap' preaching the closedV position or commencing to open, through the medium of the cam parts, .to those described in relation to Figs. y

1, 2, 3, 4, 5, and 6.

In place of the slide 18 making contact with the latch 9 through the interposition of the end 17 `of the circuit breaker lever 1 as shown in Figs. 1 and 4; connection is made in this form between the slide 18 and the latch 9 through the medium of an additional lever 48 pivoted to the casing 11 at 49; the lever 48 has a cam portion or projection 17 engaging the slideV 18, and the end of the `lever 48 has an inclined portion 47 as shown.

The circuit breaker casing 11, plungers 19-20, springs 24-25, brackets 21-22, and insulated base 23, are not altered in the application to a hinged door; but the latch 9, the rack, designated 2a in this instance, is formed on the end oflatch 9 in place of being separate asdescribed in relation to the Vother formspreviously describedin connection with a collapsible gate.

The modification ofthe parts attached to the hinged door consists of forming a projection 10a upon the bracket 46 which is secured -ftozthe door for the rack 21 to engage for ylocking the hinged door, and the provision of an additional part 45, which may be pivoted to the bracket 46, or carried by the `bracket 46, in a manne-r allowing vertical sliding movement, so as to enable the part 45 to mount the incline on rack 2ashown in Fig. 9. I f

When the hinged door V51, is closed the part 45 becomes interposed between the top `of `rack 2formed on the end of theklatch 9,

and the underside of portion 47 formed -on the end of the'lever 48; and upon the 'cam16 `being Vout of contact .with the roller 15, the springs 24-25 press the slide '18, `lever r48,' and latch 9 downward until the rack 2a Venbracket 46 thereby locking the hinged Vdoor 51, the parts taking the position shown( in shown in Fig. 8; the electric circuit being'- interrupted by the plungers 19-20 not making contact with the slide 18.

When the combined mechanical lock and electric circuit breaker is applied to the gate or door protecting the opening of the cage the cam 16 which operates the roller 15 is fixed in the well in which the cage travels, one cam at each landing at which the cage stops; but the cam 16 is carried by the cage in the manner to be hereinafter described when the lock is applied to a gate or door at a landing as follows Figs. 11 and 12 show a method of operating the combined mechanical lock and electric circuit breaker in accordance with this invention, the operating means being fixed in an intermediate position, and Figs. 13 and 14 show it fixed at the top of the gate or door. In Fig. 11 the cam 16 is secured to the arm 53 of the angle lever 54 which is pivoted at 55 to the bracket 56 which is fixed to the top of the cage 63 and which also carries the magnet 57 connected by a link 58 to the lever 54 by means of the pin 59; and upon the current circuit being made and the current switched onv the magnet 57 raises the lever 54 and weight 60 bringing the cam 16 away from making the contact with the roller 15 at any floor, during the travel of the cage 63 until the current circuit is broken, bringing the cage to rest when the weight 60 depresses the lever 54 forcing outward the arln 53 causing the cam 16 to engage the roller 15 at the particular floor at which the cage comes to rest, thereby automatically opening the lock and allowing the gate or door to be opened. In Fig. 13 the arm 53 of the lever 54 is connected by a pin 61 to a slide 62 attached to the cam 16 so that when the magnet raises the lever 54 the slide 62 brings the cam 16 clear of the roller 15 and when the current is cut oit the weight 60 depresses the lever 54 causing the slide 62 to move the cam 16 outward to make contact with the roller 15 for unlocking the gate or door, as aforedescribed. A spring may be used in place of the weight 60.

Vherever in the claims mention is made to door it will be understood that it applies to the closure of either the cage or the well whether such closure be a gate or a door and whether it slides or is hinged.

Having now particularly described and ascertained the nature of the invention, and in what manner the sane is to be performed, what I claim is:

1. A combined mechanical lock and circuit breaker comprising an electric-circuit breaker, a swinging lock-latch positioned below the circuit breaker, and a member attached to a door and adapted to be projected over the latch and rest thereon to actuate the circuit breaker to close the circuit when the door is closed and when retracted from the latch permit the circuit to be broken, when the door is opened.

2. A combined mechanical lock and circuit-breaker comprising an electric-circuit breaker including a sliding contact, a swinging lock-latch located beneath the sliding contact, and a member attached to a door and positioned to ride upon the latch to move the sliding contact to cause the contact to close thc circuit on closing the door and permit it to break the circuit on opening the door.

3. A combined mechanical lock and circuit breaker comprising an electric-circuit breaker including a sliding contact, a swinging lock-latch located beneath the sliding contact, and a swinging member connected with a door and positioned to ride upon the latch to move the sliding contact to cause the contact to close the circuit on closing the door and permit it to break the circuit on opening the door.

4. A combined mechanical lock and circuit breaker comprising an electric-circuit breaker including a sliding contact, a swinging lock-latch, located below the sliding contact, a pivoted member between the sliding contact and lock-latch, and a member connected with a door and adapted to ride upon the latch to actuate the sliding contact to close the circuit when the door is closed and permit it to break when the door is opened.

5. A combined mechanical lock and circuit'fbreaker comprising an electric-circuit breaker including a sliding contact, a swinging lock-latch below the sliding contact and a rocking arm associated therewith, a member associated with a door and adapted to ride upon the latch for actuating the sliding contact to close the circuit when the door is closed, and a cam for acting on the rocking arm to lift the lock-latch when the door is to be opened.

6. A combined mechanical lock and circuit breaker comprising an electric-circuit breaker including a movable contact for making and breaking the circuit, a locklatch below the contact for interlocking engagement with a part of the door, a member connected with the door to ride upon In Witness whereof I have signed this the latch for shifting the Contact to make Specification n the presence of two Wt- 10 the1 circuit and hold the lock-latch in internesses. l

loc (ing engagement With/the door When the T door is closed, and n cam for actuating the W' H' BREB NER' lock-latch to dsengage it from interlocking Witnesses:

engagement With the door as vthe door is 7' M. A. GREEN,

opened. THOMAS MERCOCK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents,

` Wmhington, D. G. 

